基于非对称广义高斯模型的渡越时间确定方法

DETERMINING METHOD OF THE TRANSIT TIME BASED ON ASYMMETRIC GENERALIZED GAUSSIAN MODEL

脉冲中子氧活化、示踪流量注入剖面测井技术在油田开发中具有重要作用,其中渡越时间是流量准确计算的关键和难点。为寻求通用的渡越时间计算方法,提出了一种基于广义高斯函数的优化模型,能够反映谱峰锐利程度的形状参数,以及描述谱峰对称性的左右方差参数。结果表明,该模型能够全面描述谱峰形态,适应于对称、非对称、不同锐利程度示踪谱峰渡越时间的计算。经氧活化实际资料测试,该模型在谱峰参数描述方面具有较好通用性及准确性。

The injection＇ profile logging techniques such as the pulse neutron oxygen activation and tracer flow have played the important roles in the oilfield development, the key and difficult to calculate the flow rate accurately is to determine the transit time. In order to seek the generalized calculating model, the optimized model based on the generalized Gaussian function is presented, thus the shape parameters of the peak sharpness can be represented, and so can the left and right variances to describe the peak symmetry. The results show that the model can be used to characterize the peak shapes completely and perfectly, and moreover can be adapted to many kinds of the trace peak transit time calculation no matter symmetric, asymmetric and various sharpnesses. The test in the oxygen activation logging data proves that the model has much better versatility and accuracy in the aspect of describing the peak parameters.